<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2017 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: zhangyajun <448901948@qq.com>
// +----------------------------------------------------------------------

namespace think\paginator\driver;

use think\Paginator;

class BootstrapDetailed extends Paginator
{

    /**
     * 上一页按钮
     * @param string $text
     * @return string
     */
    protected function getPreviousButton($text = "&lt;上一页")
    {

        if ($this->currentPage() <= 1) {
            return $this->getDisabledTextWrapper($text);
        }

        $url = $this->url(
            $this->currentPage() - 1
        );

        return $this->getPageLinkWrapper($url, $text);
    }



    //总数标签
    protected  function totalshow()
    {

        $totalhtml="<li class=\"disabled\"><em>共".$this->lastPage()."页</em></li>";
        return $totalhtml;

    }

    //尾页标签

    protected  function showlastpage($text = '尾页')
    {

        if($this->currentPage()==$this->lastPage())
        {
            return $this->getDisabledTextWrapper($text);

        }

        $url = $this->url($this->lastPage());
        return $this->getPageLinkWrapper($url, $text);
    }

    //首页标签

    protected  function showfirstpage($text = '首页')
    {

        if($this->currentPage()==1)
        {
            return $this->getDisabledTextWrapper($text);

        }

        $url = $this->url(1);
        return $this->getPageLinkWrapper($url, $text);
    }
  //后五页
    protected  function afivepage($text = '往后五页')
    {


        if($this->lastPage()<$this->currentPage()+5)
        {
            return $this->getDisabledTextWrapper($text);

        }
        $url = $this->url($this->currentPage()+5);


        return $this->getPageLinkWrapper($url, $text);
    }

    //前五页
    protected  function bfivepage($text = '往前五页')
    {


        if($this->currentPage()<5)
        {
            return $this->getDisabledTextWrapper($text);

        }
        $url = $this->url($this->currentPage()-5);


        return $this->getPageLinkWrapper($url, $text);
    }


    /**
     * 下一页按钮
     * @param string $text
     * @return string
     */
    protected function getNextButton($text = '下一页&gt;')
    {
        if (!$this->hasMore) {
            return $this->getDisabledTextWrapper($text);
        }

        $url = $this->url($this->currentPage() + 1);

        return $this->getPageLinkWrapper($url, $text);
    }

  //跳转到哪页
    protected  function  gopage()
    {


        return $gotohtml="<li><form><span>到第<input type='text' id='page_no' name='page'>页 <input type='button' onclick='jump()' value='确定'> </span></form></li>";
       // return $totalhtml;;

    }
    
        /**
     * 创建一组分页链接
     *
     * @param  int $start
     * @param  int $end
     * @return array
     */
    public function getUrlRange($start, $end)
    {
        $urls = [];
        if($this->lastPage <= 5){
            // 1 2 3 4 5
            for ($page = $start; $page <= $end; $page++) {
                $urls[$page] = $this->url($page);
            }
        }elseif($this->currentPage < 4){
            // 1 2 3 ... 10
            for ($page = 1; $page <= 3; $page++) {
                $urls[$page] = $this->url($page);
            }
            $urls['...'] = $this->url($this->getDots());
            $urls[$this->lastPage] = $this->url($this->lastPage);
        }elseif($this->currentPage >= 4 && ($this->currentPage+2 < $this->lastPage)){
            // 1 ... x ... 10
            $urls[1] = $this->url(1);
            $urls['...'] = $this->url($this->getDots());
            $urls[$this->currentPage] = $this->url($this->currentPage);
            $urls['....'] = $this->url($this->getDots());
            $urls[$this->lastPage] = $this->url($this->lastPage);
        }elseif ($this->currentPage >= 4 && ($this->currentPage+2 >= $this->lastPage)) {
            // 1 ... 8 9 10
            $urls[1] = $this->url(1);
            $urls['...'] = $this->url($this->getDots());
            for ($page = $this->lastPage-2; $page <= $this->lastPage; $page++) {
                $urls[$page] = $this->url($page);
            }
        }

        return $urls;
    }
    /**
     * 页码按钮
     * @return string
     */
    protected function getLinks()
    {
        if ($this->simple){
            return '';
        }

        $block = [
            'first'  => null,
            'slider' => null,
            'last'   => null
        ];

        $side   = 2;
        $window = $side * 2;

        if ($this->lastPage < $window +1) {
            $block['slider'] = $this->getUrlRange(1, $this->lastPage);

        } elseif ($this->currentPage <= $window-1) {

            $block['slider'] = $this->getUrlRange(1, $window + 1);
        } elseif ($this->currentPage > ($this->lastPage - $window+1)) {
            $block['slider']  = $this->getUrlRange($this->lastPage - ($window), $this->lastPage);

        } else {

            $block['slider'] = $this->getUrlRange($this->currentPage - $side, $this->currentPage + $side);
        }

        $html = '';

        if (is_array($block['first'])) {
            $html .= $this->getUrlLinks($block['first']);
        }

        if (is_array($block['slider'])) {

            $html .= $this->getUrlLinks($block['slider']);
        }

        if (is_array($block['last'])) {
           $html .= $this->getUrlLinks($block['last']);
        }
        return $html;
    }

    /**
     * 渲染分页html
     * @return mixed
     */
    public function render()
    {
        if ($this->hasPages()) {
            if ($this->simple) {
                return sprintf(
                    '<ul class="pager">%s %s %s</ul>',

                    $this->getPreviousButton(),
                    $this->getNextButton()
                );
            } else {
                return sprintf(
                    '<ul class="pagination"> %s %s %s %s %s  </ul>',
                   //第一页
                    //$this->showfirstpage(),
                   //上一页
                    $this->getPreviousButton(),
                   //前五页
                    //$this->bfivepage(),
                   //页码
                    $this->getLinks(),
                   //后五页
                    //$this->afivepage(),
                    //下一页
                    $this->getNextButton(),
                   //最后一页
                    //$this->showlastpage(),
                    //显示数量页码信息
                    $this->totalshow(),
                    //最后再加个参数 %s 可以显示跳转到哪页
                    $this->gopage()

                );
            }
        }
    }

    /**
     * 生成一个可点击的按钮
     *
     * @param  string $url
     * @param  int    $page
     * @return string
     */
    protected function getAvailablePageWrapper($url, $page)
    {
        return '<li><a href="' . htmlentities($url) . '">' . $page . '</a></li>';
    }

    /**
     * 生成一个禁用的按钮
     *
     * @param  string $text
     * @return string
     */
    protected function getDisabledTextWrapper($text)
    {
        if('...' == $text){
            $res = '<li class="disabled"><img src="/image/userweb/slicesImg/page-hide.png"></li>';
        }else{
            $res = '<li class="disabled"><span>' . $text . '</span></li>';
        }
        return $res;
    }

    /**
     * 生成一个激活的按钮
     *
     * @param  string $text
     * @return string
     */
    protected function getActivePageWrapper($text)
    {
        return '<li class="active"><span>' . $text . '</span></li>';
    }

    /**
     * 生成省略号按钮
     *
     * @return string
     */
    protected function getDots($text = '...')
    {

        //$url = $this->url($this->currentPage() + 1);

      //  return $this->getPageLinkWrapper($url, $text);
       return $this->getDisabledTextWrapper('...');
    }

    /**
     * 批量生成页码按钮.
     *
     * @param  array $urls
     * @return string
     */
    protected function getUrlLinks(array $urls)
    {
        $html = '';

        foreach ($urls as $page => $url) {
            if('...' == $page || '....' == $page){
                $html .= '<li class="disabled"><img src="/image/userweb/slicesImg/page-hide.png"></li>';
            }else{
                $html .= $this->getPageLinkWrapper($url, $page);
            }
        }

        return $html;
    }

    /**
     * 生成普通页码按钮
     *
     * @param  string $url
     * @param  int    $page
     * @return string
     */
    protected function getPageLinkWrapper($url, $page)
    {
        if ($page == $this->currentPage()) {
            return $this->getActivePageWrapper($page);
        }

        return $this->getAvailablePageWrapper($url, $page);
    }
}
